Silicon Carbide Crucible: Key Uses & Benefits

Silicon Carbide Crucible: Key Uses & Benefits

Introduction to Silicon Carbide Crucible

Understanding the Basics of Silicon Carbide Crucible

Silicon carbide crucible is a ceramic deep-bottomed bowl-shaped container. Its main components are natural flake graphite and silicon carbide.

Silicon carbide crucible has the characteristics of high hardness, high temperature resistance and corrosion resistance. Its high temperature resistance and corrosion resistance are better than other materials. It has higher stability, reliability, good heat preservation and often used in electronic batteries.

The Properties of Silicon Carbide Crucible

High thermal conductivity: Silicon carbide crucible is made of thermally conductive material, with compact structure, low apparent porosity and fast thermal conductivity.

Long Lasting: The same material can double or even triple the service life of regular clay graphite crucibles.

High Density: The material is homogeneous, flawless, and dense thanks to sophisticated isostatic pressing technology.

High Strength: Silicon carbide crucible has good material selection, high pressing temperature, good temperature strength, scientific product shape and high bearing capacity.

Resistance to Corrosion: The material composition of the crucible is sophisticated and can resist the physical and chemical corrosion of the fusion material.

silicon carbide crucible

Low Amounts of Residue: There is minimal adhering material on the crucible’s inner walls, eliminating thermal resistance and, in effect, greatly diminishes the danger of a crucible cracking.

High-Temperature Bearing: The silicon carbide crucible can work within a temperature range of 400- 1700 degrees. An advanced anti-corrosion mechanism also protects the graphite within its walls.

Energy Conservation and Environmental Protection: the silicon carbide crucible has high conductivity, which means that it can save a lot of fuels, reduce the effects of waste pollution, and reduce power dips due to reactive currents.

Applications of Silicon Carbide Crucible in Various Industries

  • The silicon carbide crucible application areas are as follows:
  • Metals smelting and smelting metallurgy: non-ferrous metals and alloys such as gold, silver, copper, aluminum, lead, zinc used in the metallurgical industry. It can also be used in smelting medium carbon steel and other rare metals when the purity and the vessel need high temperature resistance.
  • The ceramics and glass industries: comprise ceramic materials suitable as containers when fired at high temperatures. Similarly, they are used in the glass industry for glass melting at high temperatures or treating glass reactants in extreme temperatures.
  • Chemical synthesis and high temperature reactions: It is used in the laboratory and industrial production as a reaction vessel with high temperature, capable of handling the materials that are highly acidic or alkaline, where solid-liquid reactions can be performed at high temperatures.
  • Refractory materials: They are used for making different types of linings for high-temperature furnaces and kilns, such as combustion chambers, heat exchanger components, pipe linings etc.
  • Furthermore, silicon carbide crucibles also find application in abrasives industry and pharmaceutical manufacturing as well as laboratory research.

The Production Process of Silicon Carbide Crucible

Preparation of silicon carbide powder:

Silicon carbide powder, which forms the primary material for making a silicon carbide crucible, usually ends up being obtained through the thermal reduction method done in a calcium carbide furnace. The steps of carbonization reaction, heating sintering and carbon ion reduction during production will result in fine powders with high purity.

Material proportioning and mixing:

Mix certain amount of silicon carbide powder with other suitable materials such as binder and flow aid, then stir well after drying press lime or grouting.

silicon carbide crucible

Silicon carbide crucible molding:

There are two methods namely: dry press molding and grouting molding.

Dry-press molding refers to putting the dried mixture into the mold and pressing it uniformly under high pressure so as to form a shaped body;

slip casting involves pouring the mixture into molds, deaerating by vibration, drying at high temperatures to shape.

Sintering and processing of silicon carbide crucible:

The formed crucibles are fired till they become more compacted and harder while grinding, cutting, sandblasting etc is done on them to make their surfaces smooth flat enough for use.

How to Make Silicon Carbide Crucible Last Longer?

Ways to extend the service life of silicon carbide crucible are as follows:

  • Use and operation properly: During use, the temperature and pressure should be within the limits that can be sustained by the crucible, and there must be a correct procedure for using and operating it, especially when loading or unloading samples in order to prevent extra force on the crucible. Such impact and friction.Silicon Carbide Crucible
  • Ensure you take good care of your equipment: It is important to protect and extend the service life of a crucible through maintenance. Frequent checks should be made on its state during use, cleaning up both inside and outer surfaces immediately after they become dirty to avoid potential harm to such items coming from carbon buildup or contamination.
  • Consideration should  be given for storage environment: It is essential that silicon carbide crucibles are kept in dry places so as not allow moisture because this can react with any matter placed in it thus losing its original features
  • Post-use maintenance: Do not let molten metal solidify inside of a crucible. Remove all molten metal before turning off furnace power. While still hot, scrape slag off the walls of the crucible using appropriate tools.


Over the years, Yafeite has not only supplied high-quality silicon carbide products but have also partnered with clients to solve complex engineering challenges, optimize their processes, and achieve unprecedented efficiencies.

Our expertise spans across various applications, from metallurgy and foundry work to advanced semiconductor manufacturing and aerospace engineering, reflecting the versatile nature of silicon carbide.

Ready to elevate your industrial processes with the unmatched resilience and efficiency of silicon carbide crucibles? With 20 years of specialized experience, we’re here to guide you through selecting the perfect silicon carbide products for your needs, ensuring optimal performance and longevity.

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